Some apple trees make good pollinators. Some are triploid and are not able to pollinate others. You'd have to check on the varieties you are interested in.And thank you so much for the info on pollinating and number of chill days! I had no idea you needed another variety of apple to pollinate! Maybe that's why ours did so poorly. The chill days are interesting too. Thank you ao much for all the.info!
Did you have a bad apple season this year? It was the best we have ever had. So many that I never did get to pick all of them.